The celestial show is the result of the Sun, Earth, and Moon lining up perfectly for a lunar eclipse just as the Moon is near its closest orbit point to Earth, making it appear “super” large.

It is the second full Moon within the same month, a phenomenon called a “blue” Moon which has nothing to do with its color.

The “blood” in the name comes from the reddish brown color the Moon takes on when Earth enters between it and the Sun, cutting off the light rays that usually brighten the lunar surface.

Depending on cloud cover, the spectacle will first be visible in the pre-dawn skies of the western United States, when the setting Moon enters the path of the eclipse, astronomers say.

“Weather permitting, the (American) West Coast, Alaska, and Hawaii will have a spectacular view of totality from start to finish,” said NASA Moon expert Gordon Johnston, advising amateur astronomers to “set your alarm early and go out and take a look.”

Totality is when the Moon is completely shadow-covered.

The extreme east of Africa, the Middle East and Asia, Russia, Australia and New Zealand can enjoy the spectacle on Wednesday night, as the Moon rises there.

The last “super blue blood Moon” occurred on December 30, 1982, when it was seen in Europe, Africa, and western Asia.

For North America, the last time was in 1866.

This time around, viewing will be a challenge for those on the US East Coast. The eclipse begins just as the Moon is setting in the west and the Sun is rising in the east.

If you miss this one, the next blue Moon total lunar eclipse will happen on December 31, 2028, though it won’t be quite as large since it will not be as close to Earth.